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Electrical Machines

Electrical Machines
In a dc machine 4 pole lap winding is used. The number of parallel paths are?

 2
 1
 8
 4

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Electrical Machines
In single phase rotary converter the number of slip rings will be

 six.
 four.
 two.
 three.

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Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

 none of these.
 cylindrical.
  salient.
 non uniform cylindrical.

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Electrical Machines
Iron loss in a transformer mainly occurs in

 steel core in transformer.
 winding of transformer.
 iron made tank of transformer.
 transformer insulating oil.

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Electrical Machines
In DC generator on no-load, the air gap flux distribution in space is

  flat topped.
  pulsating.
 triangular.
  sinusoidal.

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Electrical Machines
The crawling in the induction motor is caused by

 improper design of stator laminations
 high loads
 harmonics developed in the motor
 low voltage supply

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